The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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U Type Shaft-to-Shaft
    The U Type is the basis for all Uniflex couplings. It is a shaft-to-shaft flexible coupling with a simple one piece design, making it ideal for indexing, robotic or positioning applications. The U Type consists of a triple-wound flexible steel spring brazed to a steel hub at each end. This all steel design ensures optimum equipment protection in severe environments and/or high temperature applications. Regular and short versions are available for most sizes to accommodate different overall length requirements. Special hub or bore modifications are also possible. These units can be supplied with either pin holes or with keyways and set screws. Lovejoy does not recommend the reboring of uniflex couplings by customers due to potential damage to the brazed joint.
    This is a durable one-piece flexible coupling for general purpose shaft-to- shaft applications. It is the basis for all Uniflex coupling types.
U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial-2
Unit of Measure
Items U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
68514476375
U Type with Keyway, Regular Version - Metric Bores 		U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
68514476253
U Type with Keyway, Regular Version - Metric Bores 		U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
68514476473
U Type with Keyway, Regular Version - Metric Bores 		U Type Uniflex Couplings w/ Keyway, Regular Version, Shaft-to-Shaft Configuration - Imperial
68514476433
U Type with Keyway, Regular Version - Metric Bores
Description  N/A U62R-CP-8MMH7X8MMH7-NKW LH N/A U75R-CP-12MMH7X1/2 N/A U87R-CP-16MMH7X20MMH7 N/A U125R-CP-14MMH7X3/4
Bore Size    N/A 8 x 14 mm N/A 12 mm x 1/2 in mm N/A 16 x 20 mm N/A 14 mm x 3/4 in mm
Hub Style N/A Regular
Type N/A Shaft-to-Shaft
Hub Size N/A U62R N/A U75R N/A U87R N/A U125R
Material N/A Steel
Set Screw Thread Size (Dimension T) N/A M6 x 8 N/A M6 x 6 & 1/4-20 N/A M6 x 8 N/A M 10 x 16 & 3/8-16
Keyway Size N/A No Keyway & 5 x 2.3 mm N/A 4 x 1.8 mm & 1/8 x 1/16 in N/A 5 x 2.3 mm & 6 x 2.8 mm N/A 5 x 2.3 mm & 3/16 x 3/32 in
Weight N/A 0.77 lb N/A 0.82 lb N/A 1.32 lb N/A 2.70 lb
Weight (Complete Coupling w/ Max. Bores) N/A N/A N/A 1.40 lb0.63 Kg N/A
Dimension HD N/A 1.420 in36.07 mm N/A 1.420 in36.07 mm N/A 1.730 in43.94 mm N/A 2.170 in55.12 mm
Overall Length N/A 2.720 in69.09 mm N/A 3.310 in84.07 mm N/A 3.50 in88.90 mm N/A 4.880 in123.95 mm
Pin Location (Dimension SL) N/A 0.38 in N/A 0.41 in N/A 0.44 in N/A 0.62 in
Color N/A Gray/Metallic
Operating Temperature Range N/A -40 to 250 ºF
Max. Torque N/A 126.00 in·lb N/A 175 in·lb N/A 346 in·lb N/A 755 in·lb
Length thru Bore N/A 0.840 in21.34 mm N/A 0.840 in21.34 mm N/A 0.840 in21.34 mm N/A 1.280 in32.51 mm
Bore Type N/A Finished Bore
Min. Bore (Dimensions ID1/ID2) N/A 0.315 in8.00 mm N/A 0.394 in10.00 mm N/A 0.438 in11.00 mm N/A 0.630 in16.00 mm
Max. Bore (Dimensions ID1/ID2) N/A 0.63 in16 mm N/A 0.748 in19.00 mm N/A 0.866 in22.00 mm N/A 1.260 in32.00 mm
Max. Speed N/A 20000.00 rpm N/A 20000.00 rpm N/A 10000 rpm N/A 6000 rpm
Axial Misalignment (∆ Ka) N/A 0.035 in0.89 mm N/A 0.040 in1.02 mm N/A 0.040 in1.02 mm N/A 0.040 in1.02 mm
Max. Parallel Misalignment N/A 0.019 in0.48 mm N/A 0.028 in0.71 mm N/A 0.035 in0.89 mm N/A 0.044 in1.12 mm
Wind-Up Angle at Nominal Torque N/A 0.85 º N/A 1.82 º N/A 1.68 º N/A 1.85 º
Wind-Up Angle at Max. Torque N/A 3.00 º N/A 4.5 º N/A 4.5 º N/A 4.5 º
Rated HP at 100 rpm N/A 0.20 hp N/A 0.28 hp N/A 0.55 hp N/A 1.21 hp
# of Set Screws Required per Hub N/A 1
Cubic inches N/A 5.48461 in³ N/A 6.67428 in³ N/A 10.47515 in³ N/A 22.97943 in³